Constant yawning and issues with your breathing may be symptoms of health problems like anxiety, panic attacks, or heart, lung, and breathing problems. Sometimes, these symptoms may occur without any apparent reason and may not be a cause for alarm, as you can manage them by doing breathing exercises.

For several years, the main theory was that yawning brings in more oxygen — mainly for your brain. More recently, researchers discarded this theory, as studies revealed that a controlled lack of oxygen doesn't result in more yawning than usual.

Excessive yawning can be related to the vagus nerve, which runs from the bottom of the brain down to the heart and stomach. In some cases, excessive yawning may indicate bleeding around the heart or even a heart attack. Other symptoms that may indicate a heart problem include: pain in the chest.